LT8672JMS#PBF

LT8672JMS#PBF is an active rectifier controller for reverse input protection. It drives an external N-channel MOSFET to replace a power schottky diode. It has very low quiescent current and fast transient response to meet the tough requirements in automotive applications, where AC input signals up to 100KHz are present. This ensures that the signal is rectified with minimum power dissipation on the external FET, simplifying thermal management on the PCB. With a voltage drop of only 20mV, the LT8672 solution allows for simpler and more efficient circuits, easing the minimum input voltage requirement during cold crank and start-stop scenarios. In case of input power source failure or short circuit, a fast turn-off minimizes reverse current transients. An available shutdown mode reduces the quiescent current to 3.5μA. Applications include automotive battery protection, industrial supplies, and portable instrumentation.

• Reverse input protection to -40V, accurate 1.21V enable pin threshold
• Improved performance compared to a schottky diode
• Reduce power dissipation by <gt/>90%, reduce drop to 20mV
• Ultrafast transient response - rectifies 6VP-P up to 50KHz, rectifies 2VP-P up to 100KHz
• Wide operating voltage range from 3V to 42V, minimum drain voltage is 2.85V typical
• Total system quiescent current is 3.5µA typ (VEN/UVLO = 0V, TA = 25°C)
• PG pull-down resistance is 650 ohm typical at (VPG = 0.1V)
• Gate pull-down current is 300mA typ at (TA = 25°C)
• SOURCE–DRAIN regulation voltage range from 10 to 25mV
• 10 lead plastic MSOP package, operating junction temperature range from -40°C to 150°C

บันทึก

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